I would actually have gone with Hughes to start the 9th. You're already playing with house money, so to speak, on the road trip. Your bullpen is gassed. You don't have any good RH options anyway, and there's a decent chance the game is going to go extras and you'll use him anyway. Maybe he gets shelled and you send a message to your front office that if you put someone in my pen, you're forcing my hand.
Just roll the dice, don't put any more innings on the rest of your pen, and hope for the best with Hughes. At the least, he's unlikely to be wild and issue a bunch of walks.